A card payments system issues, authorizes, and settles every card transaction. When authorization is slow or fraud checks are too rigid, that shows up as a declined transaction. We design issuance, authorization, and compliance as one system, built for banks, fintechs, and program managers who need every transaction to clear on their busiest day.
Book a card system call
85%
Long-term Partnerships
75%
Mid-to-Senior Engineers
5+
Avg. Years of Engineer Experience
98%
Would Recommend Us
Chances are one of these is true.
What we build for the system.
We build card issuance, real-time authorization, compliance controls, and ongoing fraud monitoring as one system, not separate vendor pieces stitched together. Each part is designed for the volume and audits real card payment processing has to survive.
Virtual and physical cards, provisioned into Apple Pay and Google Pay.
Virtual & physical issuanceApple/Google Pay provisioningCard lifecycle managementTokenization
We build the issuance layer that creates virtual and physical cards, provisions them into Apple Pay and Google Pay, and manages the card lifecycle from activation to reissue, connecting to the core banking integration your program runs on. Tokenization keeps card data out of systems that do not need it.
Approve or decline logic that routes across schemes and currencies.
Approve/decline logicMulti-currency processingProgram-level spend limitsScheme routing
The authorization engine reads every transaction and decides to approve or decline in real time, built on the same payment gateway development practice we run across Zethic's fintech work. We route across card schemes and currencies, so a spike in one channel does not slow every channel.
Scoring built into the authorization path, not bolted on after.
Real-time fraud scoringAnomaly detectionChargeback reductionBehavioral risk signals
Fraud checks run inside the authorization path itself, applying the same layered approach behind fintech fraud detection, scoring each transaction before it clears rather than flagging it after a chargeback lands. We tune the model to your program's actual patterns, not a generic risk profile.
PCI DSS controls and reporting built from the same system.
PCI DSS controlsEncryption and tokenizationAudit trail designTransaction reporting
Card scheme certification and PCI DSS assessment expect specific standards, from tokenization to encrypted data storage, the same ground our fraud detection and compliance services cover for KYC and risk. We build reporting alongside compliance, so audit evidence and analytics come from one system.
Zethic's fintech practice, spanning banking, payments, lending, insurance & forex.
Why banks & fintechs pick us.
Card processing differs from a checkout flow, and we treat it that way. Our engineers design for issuance, authorization, and certification from day one.
PCI DSS and scheme certification are not an afterthought in how we design it. Tokenization and audit trails are part of the architecture from day one.
You work with engineers from our fintech team in Bangalore who have built card infrastructure before, not a team learning issuance on your project.
If you have existing card payment processing, we migrate it in stages, so live transactions keep moving while we rebuild underneath it.
Senior engineers from day one, with real scheme certification experience behind them. Our card payments system development pairs you with people who have built card infrastructure before, not an account manager relaying notes.
Start a card system build{ 01 }· Week 1
We learn your volume, your scheme and processor relationships, and the PCI DSS requirements that apply, so your card processing is scoped before build starts.
{ 02 }· Week 2-3
We design the issuance layer, the authorization engine, and the compliance controls your processing needs for scheme certification, with scaling built in.
{ 03 }· Build
We build the system in tested increments and run it against burst conditions, not just average traffic, so it holds up on your busiest day.
{ 04 }· Launch and run
We take card payment processing through certification testing and into production, then stay on for monitoring and the next release on your roadmap.
Questions, answered.
A card payments system is the issuance, authorization, and settlement layer that lets you issue virtual or physical cards and process transactions in real time. Any bank, fintech, or program manager launching or scaling a card program needs one, whether built in-house or run through a processor.
Yes. We design the system to meet card scheme and PCI DSS technical requirements from the start, including the sandbox and testing stages, so certification is a checkpoint rather than a rebuild.
Yes. Much of our work is modernisation: migrating issuance and authorization logic in stages so your live transaction volume keeps moving while we rebuild the parts that need it.
Cost depends on your existing infrastructure, your transaction volume, and how much of the system needs to be built versus modernised. We scope this after a short discovery and agree the cost and timeline before any build work starts.
We design the authorization layer to distribute load across servers and scale horizontally, applying the same layered security thinking behind payment gateway security so a traffic spike never becomes a compliance gap. This is tested against burst conditions before launch, not assumed.
Tell us about your transaction volume and where you are in scheme certification. A senior engineer replies within one working day, no sales script.
Tell us the build
Share your transaction volume, and scheme and processor relationships. We sign an NDA so it stays between us.
Talk it through
A senior engineer works through the issuance, authorization design, and certification requirements with you.
Get a clear plan
A scoped architecture plan with an honest cost band and scheme certification built into the timeline.
Tell us about your transaction volume and where you are in scheme certification. A senior engineer replies within one working day, no sales script.
